$75 shipped Thanks

Does anyone know if these barrels on hkparts are hdps runs or if they are any good? Can’t find any info of them, they have hdps listed but back ordered. https://hkparts.net/product/ump-45-threaded-3-lug-barrel-16-x-1-left-hand-p18678.htm

I have a NIB SP89 IK (1989) with original box, a HK MP5K barrel, 10 New HK 30 rd mags, New HK A3 stock (not the F type) F/A bolt carrier and 3 position lower. I want to sell as a package not parted out. Was going to have Michael's Machine to do a full MP5K conversion and I have everything so you...

In the past year we have now had more information released by the U.S. government on UFOs than I've seen regarding the Geissele MR417 handguard. Are they EVER going to do a run of these again? I've called.....and called........and emailed........and called.............and...

Anyone ever put a Trijicon SRO on their SBR’d SP5? I have an MRO, and an RMR. Never held an SRO, but from pictures they look (size-wise) somewhere in between the two above optics. I understand maybe they’re only supposed to be used on pistols(?) Thoughts appreciated...